Means for facilitating the starting of internal combustion engines for motor vehicles using a vacuumgoverned fuel injection pump



Jan. 21, 1941. R. F. COLELL 2,229,048

MEANS FOR FACILITATINGTHE STARTING OF INTERNAL COMBUSTION ENGINES FORMOTOR VEHICLES USING A VACUUM-GOVERNED FUEL INJECTION PUMP" Filed Sept.7, 193B 2 Sheets-Sheet l g j? 1" lfl j fffl ffff I: ..i I- 1 7" v """"fI a I 1 J H .3 15* Q 6 C I Ill .11-..- P

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a Q I I119: enfibrz Jan. 21, 1941. R; F. COLELL 2,229,048 MEANS FORFACILITATING THE STARTING OF INTERNAL COMBUSTION ENGINES I FOR MOTORVEHICLES USING A VACUUM-GOVERNED FUEL INJECTION PUMP Filed Sept. 7, 19382 Sheets-Sheet 2 77/ i g a B 7 f ,fizvmfiol': Pickara' Friedrick (Hell.

carries at its upper end a set-screw P forming the stop to the forwardmovement of the pump rack C. The set-screw is adjustable in relation tothe lever M and is secured in its adjusted position by a lock nut p.

The whole of the mechanism comprised in the auxiliary governor and thelever M and stop P are enclosed in a casing Q and are inaccessible tothe driver of the vehicle.

Assuming that the engine is stationary, the parts are as shown inFigure 1. It will be seen the sleeve K is being pressed by the spring Las far as it willgo in a rearward direction so that the lower end oi thelever M is also in its most rearward position and the stop P in its mostforward position. There being no suction in the chamber E the spring Fis pressing the pump rack G forwardly against the stop P. With the pumprack in this position and as soon as the engine is turned for-startingthe pump delivers fuel in excess or the normal maximum delivery, thusIacilitating starting. when the engine has started the engine suctioncauses the pump rack C to move away from the stop; but so long as theengine has not reached a predetermined speed the centrifugal force ofthe weights h is not sumcient to impel the sleeve K forwardly againstthe force ofthe spring L and the parts of the auxiliary governor as wellas the stop P are still in the same position as that shown for theseparts in figure 1.

As soon, however, as the engine reaches a predetermined speed thecentrifugal i'orce oi the weights it becomes sumcient to impel thesleeve K to its fully forward position, its forward end then comingagainst the collar of the sleeve G. The lower end of the lever M isthereby rocked tor-ward and the stop P moved to its 'rearmost position.The engine is then in its idling conpump rack encounters the stop P (seeFigure 8).

The stop is, however, in its rearward position so that further increaseof fuel is prevented. The movement of the stop P in a rearwarddirection, is, of course, limited by the engagement of the sleeve Kagainst the collar :7

Thus, tor running of the vehicle, the fuel supply t exceed apredetermined controlled maximum per cycle; but for starting a supply inexcess of such controlled maximum is obtained.

Having fully described my invention what I 10 ative at all engine speedsto control the fuel supply. a fuel injection pump, a control rodcontrolling the quantity of fuel supplied at each stroke of the pump andconnected to said diaphragm in such a manner that as the vacuumdecreases the control rod is moved in adirection to increase the fuelsupply, a stop to limit the movement of said rod in said direction, saidstop remaining in one definite position during all normal runningspeeds, and an auxiliary centrifugal out of said definite position toallow of the injection of an excess of fuel ior starting and moved backto its definite position for running.

2. In combination with the means claimed in governor by means of whichsaid stop is moved claim 1 said stop being carried on the end of one armoi a lever pivoted at an intermediate point,

the other arm oithe lever being connected to and operated by the saidcentrifugal governor.

3. In combination with means as claimed in claim l, a casing by whichthe centrifugal governor parts are completely enclosed and renderedinaccessible.

